The number ... n one quarter of the number ... 1/4 of n = 1/4 * n one third of the number ... 1/3 of n = 1/3 * n one quarter of the number is subtracted from one third of the number ... 1/3 * n - 1/4 * n the result is 7 ... = 7
We can put it together: 1/3 * n - 1/4 * n = 7 4/12 * n - 3/12 * n = 7 1/12 * n = 7 /*12 n = 7 * 12 n = 84
It is 180% because one rectangle is fully shaded which means that is 100%. THe other one is 4/5 of the way shaded or 80% shaded. So add and you get 180%
